High Energy Physics Seminar: Dr. Kurt Jung, Purdue University

Title: Flavors in the Soup: An overview of heavy flavor jet physics at CMS

Abstract: At the CERN LHC, heavy nuclei are collided at ultra-relativistic energies such that a large enough energy density is reached in order to form a quark-gluon plasma (QGP). Hard-scatterings of partons often produce high-momentum particle jets, which can be used to characterize the interaction strength of the QGP. Measurements of the energy loss of jets in heavy-ion collisions are expected to depend on the flavor of the initial fragmenting parton, so comparisons of energy loss of jets between collisions involving heavy nuclei and proton-proton collisions for different jet parton flavors can help quantify such energy loss effects. In this talk, I will present the heavy flavor jet tagging methodologies used at CMS, along with the spectra and measurements of the jet energy modification. I will show these results from both PbPb and pPb collisions using the high statistics proton-proton, proton-lead and lead-lead data taken in 2011 and 2013.